X-ray Emission and Discharge Behavior on Three Kinds of Stacked Pyroelectric Single Crystal Units

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  • YAMAMOTO Takashi
    Department of Natural Science, Division of Science and Technology Department of Mathematical and Material Sciences, Faculty of Integrated Arts and Sciences, Tokushima University
  • MIYAZONO Takuji
    Department of Mathematical and Material Sciences, Faculty of Integrated Arts and Sciences, Tokushima University
  • KURIMOTO Akihito
    Department of Mathematical and Material Sciences, Faculty of Integrated Arts and Sciences, Tokushima University

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Other Title
  • 形状の異なる焦電結晶積層体によるX線発生挙動および放電特性
  • ケイジョウ ノ コトナル ショウデンケッショウ セキソウタイ ニ ヨル Xセン ハッセイ キョドウ オヨビ ホウデン トクセイ

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Abstract

<p>Three types of stacked LiTaO3 single crystal units were assembled to investigate effects of shape of the single crystal and degree of ambient pressure on X-ray emission and discharge behavior based on the pyro electricity. Every instantaneous emission of visible light due to discharge occurred at the side of stacked crystals during heating and cooling cycle between room temperature and 400 K under atmospheric pressure. Discharge frequency on a stacked unit made of equal-sized four pieces (type-A) was five times more than that on a unit made of irregularly-sized pieces (type-C). Discharge occurred possibly at narrow gap between two pieces of plate-like single crystal. During heating process up to ca. 400 K under 1 or 10-4 Pa, spike-like X-ray emission for a few seconds through one minute occurred repeatedly on both type-A and -C units. The maximum energy of emitted X-ray was independent on both degree of vacuum and shape of stacked plate-like LiTaO3 single crystal. Discharge on type-A unit was suppressed by coating of stacked crystals with dielectric grease whereas high voltage generated on the coated unit. Origin of spike-like X-ray emission and discharge on stacked LiTaO3 units was discussed.</p>

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